S65 



A New Guinea species. 

 Four or five New Guinea 

 species. 



Eurysiomus , saine at Ma- 

 cassar and Lombock. 



One New Guinea, one Aus- 

 tralian. 



Podargus 2iïïdi Caprimulgus'. 



Four or five New Guinea 

 species. 



Centrojjus and Clirysococ* 



Frooi this list, and the preceding observations , it 

 wil be seen that many Australian genera and some spe- 

 aes occur in Aru; while, considering the very small 

 lumber of species known froni New Guinea, and the 

 lecessarily very inperfect exploration of Aru in such 

 a short time, the number of identical species is very 

 Kmarkable. I believe that nearly one-half of the hit- 

 brto-described species of passerine birds from New Gui- 

 lea will be found in my Aru coUections , a proportion 

 ^hich we could only expect if all the species of the 

 itter country inhabit also the former. Such an iden- 

 Ity occurs, I believe, in no ether countries separated 

 ")y so wide an interval of soa , for the average distance 

 of the coast of Aru from that of New Guinea is at 

 least 150 miles, and the points of nearest approach 

 upwards of 100. Ceylon is nearer to India; Van Die- 



